--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/clang/test/PCH/friend-template.cpp	Thu Feb 13 15:10:13 2020 +0900
@@ -0,0 +1,46 @@
+// Test this without pch.
+// RUN: %clang_cc1 -include %s -fsyntax-only -verify %s
+
+// Test with pch.
+// RUN: %clang_cc1 -emit-pch -o %t %s
+// RUN: %clang_cc1 -include-pch %t -fsyntax-only -verify %s 
+
+// expected-no-diagnostics
+
+#ifndef HEADER
+#define HEADER
+
+// rdar://12627738
+namespace rdar12627738 {
+
+class RecyclerTag {
+    template <typename T> friend class Recycler;
+};
+
+}
+
+#else
+
+namespace rdar12627738 {
+
+template<typename TTag>
+class CRN {
+    template <typename T> friend class Recycler;
+};
+
+
+template<typename T>
+class Recycler {
+public:
+    Recycler ();
+};
+
+
+template<typename T>
+Recycler<T>::Recycler ()
+{
+}
+
+}
+
+#endif